Narrative:

Aircraft X was in the local traffic pattern conducting touch and go's. On the downwind; I instructed the pilot to extend and expect a long downwind to follow aircraft on a 6 mile final. I had prior knowledge that this pilot was a student pilot and I simplified the instruction to include that; 'I will call your base turn'. On a 5 mile downwind I instructed the pilot to 'turn base' and cleared it to land runway 9L. The pilot acknowledged [but there was traffic on] 9R finals causing an near midair collision with an aircraft on the 9R final. I instructed the pilot to continue southbound to avoid conflict with the aircraft; after attempts to have the pilot comply with my instructions to had to hand off the aircraft to the controller whose airspace the pilot was in. The level of knowledge of ATC procedures should be set higher for pilots conducting first solos or flying in controlled airspace. Language barriers and lack of procedures allowed this pilot to put itself and other aircraft in immediate danger. This issue has been discussed routinely with the flight schools yet there is no accountability by the schools or the FAA management. I recommend less student traffic during high volume periods; more understanding of ATC phraseology; and knowing a higher level of basic english. This airport is highly volatile and unsafe due to communication issues.

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Original NASA ASRS Text

Title: TMB Tower Controller reports of a NMAC with a student pilot and an aircraft on final for a parallel runway. Language barrier was also stated to be a factor.

Narrative: Aircraft X was in the local traffic pattern conducting touch and go's. On the downwind; I instructed the pilot to extend and expect a long downwind to follow aircraft on a 6 mile final. I had prior knowledge that this pilot was a student pilot and I simplified the instruction to include that; 'I will call your base turn'. On a 5 mile downwind I instructed the pilot to 'turn base' and cleared it to land Runway 9L. The pilot acknowledged [but there was traffic on] 9R finals causing an NMAC with an aircraft on the 9R final. I instructed the pilot to continue southbound to avoid conflict with the aircraft; after attempts to have the pilot comply with my instructions to had to hand off the aircraft to the Controller whose airspace the pilot was in. The level of knowledge of ATC procedures should be set higher for pilots conducting first solos or flying in controlled airspace. Language barriers and lack of procedures allowed this pilot to put itself and other aircraft in immediate danger. This issue has been discussed routinely with the flight schools yet there is no accountability by the schools or the FAA Management. I recommend less student traffic during high volume periods; more understanding of ATC phraseology; and knowing a higher level of basic English. This airport is highly volatile and unsafe due to communication issues.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.